Raman Spectra of Aragonite at the Pressure of O.1 ～2 GPa and Ambient Temperature

利用碳化硅压腔结合拉曼光谱分析技术,研究了常温0.1～2 GPa压力下文石的拉曼光谱特征,并得出文石拉曼位移与压力之间的关系:v153(cm-1)=0.003 5p(MPa)+154.0,v206=0.006 0p+206.3,v704=0.002 1p+704.2,v1085=0.003 5 p+1 085.3.在实验的压力范围内,未观察到文石的相变.另外,与其他碳酸盐矿物(菱镁矿、白云石)类似,0～2 GPa压力下文石的对称伸缩振动拉曼位移随压力变化的dv1025/dp值大于超高压条件下的dv1025/dp值,表明碳酸盐矿物[CO3]基团中C-O键的可压缩性和压力有关,其可压缩性在0.1～2 GPa时较大,压力升高可压缩性降低.Raman spectra of aragonite were studied at ambient temperature and pressure of 0. 1 similar to 2 GPa in a moissanite anvil cell using Raman spectrum technique. The relations between the Raman shifts of aragonite and the system pressure are given as follows: v(153)(cm(-1)) =0. 003 5p(MPa) +154. 0, v(206) = 0. 006 0p+206. 3, v(704) = 0. 002 1p+ 704. 2, v(1) (085) = 0. 003 5p+1 085.3. No phase transition occurred in aragonite within the range of experimental pressure. Similar to other carbonate minerals (magnesite, dolomite), the measured relative pressure-shift of the Raman line of the symmetric stretching vibration of aragonite is greater at 0. 1-2 GPa than at ultrahigh pressure, which indicates that the C-O bond compressibility of the CO(3) groups is related to the pressure, and it is more compressible at 0. 1 similar to 2 GPa than at higher pressure.国家自然科学基金; 国家重点基础研究发展计划项目http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000286290900030&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701SCI(E)EIPubMed中文核心期刊要目总览(PKU)中国科技核心期刊(ISTIC)中国科学引文数据库(CSCD)01127-1303